''Helina duplex'' is a species of

fly Flies are insects of the Order (biology), order Diptera, the name being derived from the Ancient Greek, Greek δι- ''di-'' "two", and πτερόν ''pteron'' "wing". Insects of this order use only a single pair of wings to fly, the hindwing ...

in the family Muscidae. It is found in Papua New Guinea, including the Bismark Archipelago, and Queensland, Australia. It was the only ''Helina'' species recorded in Papua New Guinea before 1984.

References

Muscidae Insects of Australia Diptera of Australasia Insects of Papua New Guinea Taxa named by Paul Stein Insects described in 1900 {{muscidae-stub